im new to Spring and hibernate, i got the error above when trying to persist the transaction data. please try to help this problem
Here's my Entity:
#Entity #NamedQuery(name="Employee.findAll", query="SELECT e FROM Employee e")
public class Employee implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String city;
private String civil;
#Temporal(TemporalType.DATE)
#Column(name="dob", length=11)
private Date dob;
private String email;
private int epf;
private String fname;
private String gender;
private int landtp;
private String lname;
#Temporal(TemporalType.DATE)
#Column(name="salaryincrement", length=11)
//bi-directional many-to-one association to Designation
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name="designation_id", nullable=false)
private Designation designation;
public Employee() { }
#Entity
#NamedQuery(name="Designation.findAll", query="SELECT d FROM Designation d")
public class Designation implements Serializable{
private static final long serialVersionUID = 1L;
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id;
private String type;
//bi-directional many-to-one association to Employee
#OneToMany(mappedBy="designation")//, cascade=CascadeType.ALL
private List<Employee> employees;
public Designation() {
}
this is my Entity class,
Entities have a getters ans setters
designation is set nullable = false. However employees variable isn't initialized in Designation. So, you'll have to initialize as
#OneToMany(mappedBy="designation")//, cascade=CascadeType.ALL
private List<Employee> employees = new LinkedList<>();
I'm not sure that you can go with primitive type int as your Id - you should probably use Integer - because int has default zero value and cannot be null, your new record can be rather seen as a detached entity with Id ZERO and not as a transient one.
The same mistake is in Designation class.
See Primitive or wrapper for hibernate primary keys
Related
I'm using Hibernate in my spring project. But It doesn't work for One-To-One relationships. It gives me the below error.
Unable to build Hibernate SessionFactory; nested exception is org.hibernate.MappingException: Could not determine type for: com.example.TransfertNational.model.Client, at table: ComptePaiement, for columns: [org.hibernate.mapping.Column(client)]
I have ran some searches in the internet, but it doesn't work for me.
the Client Entity :
#Data #Entity
#AllArgsConstructor #NoArgsConstructor #ToString
public class Client {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String typeTransfert;
private String typePiece;
private String cin;
private String sexe;
private String prenom;
private String typePieceIdentite;
private String paysEmission;
private String numPI;
private String validitePI;
private String dateNaissance;
private String profession;
private String nationalite;
private String paysAdresse;
private String adresseLegale;
private String ville;
private String gsm;
private String email;
#OneToMany(fetch = FetchType.LAZY,
cascade = CascadeType.ALL)
private Set<Beneficiaire> beneficiares;
#OneToOne(fetch = FetchType.LAZY,
cascade = CascadeType.ALL)
private ComptePaiement comptePaiement;
}
the ComptePaiement Entity :
#Data
#Entity
#AllArgsConstructor
#NoArgsConstructor
#ToString
public class ComptePaiement {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int id;
private String solde;
private String rip;
private Client client;
}
Answer from comments:
You are probably missing #JoinColumn on Client or ComptePaiement and mappedBy in #OneToOne annotation, depending which will hold reference id in database.
I'm fairly new to Spring. I'm trying to query all the donations under one donor with this ERD:
Donor |----* Agreement *----| Donations (A many-to-many relationship that uses a bridge table)
Here's my code:
Donor.java
#Entity
#Data
#AllArgsConstructor
#NoArgsConstructor
public class Donor extends Auditable implements Comparable<Donor>{
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#NotBlank(message = "Cannot have an empty account number field.")
private String accountNumber;
private String accountName;
private String salutation;
private String donorName;
private String cellphoneNumber;
private String emailAddress;
private String companyTIN;
private String phone1;
private String phone2;
private String faxNumber;
private String address1;
private String address2;
private String address3;
private String address4;
private String address5;
private String companyAddress;
private LocalDate birthDate;
private String notes;
#OneToMany(mappedBy = "donor")
List<MOA> moaList = new ArrayList<>();
...
}
Donation.java
#Entity
#Data
#AllArgsConstructor
#NoArgsConstructor
public class Donation extends Auditable implements Comparable<Donation> {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#NotBlank(message = "Cannot have an empty account number field.")
private String accountNumber;
private String accountName;
private String orNumber;
private String date;
private Double amount;
private String notes;
private String needCertificate;
private String purposeOfDonation;
#OneToMany(mappedBy = "donation")
List<MOA> moaList = new ArrayList<>();
...
}
MOA.java (Agreement)
#Entity
#Data
#NoArgsConstructor
#AllArgsConstructor
public class MOA extends Auditable{
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#ManyToOne
#JoinColumn(name = "donor_id")
#JsonIgnoreProperties("moaList")
private Donor donor;
#ManyToOne
#JoinColumn(name = "donation_id")
#JsonIgnoreProperties("moaList")
private Donation donation;
private String name;
private String donorAccountNumber;
private Long foreignDonationId;
private LocalDate dateSigned;
}
In my DonorRepository I'm trying to make this query which I expected would give me what I want:
public interface DonorRepository extends JpaRepository<Donor, Long> {
...
#Query(value = "SELECT * FROM donor WHERE account_number = ?1", nativeQuery = true)
List<Donation> findDonorsDonations(String accountNumber);
...
This gives me an error
Failed to convert from type [java.lang.Object[]] to type [com.package.server.domain.Donation] for value '{1, admin, 2021-04-01 10:29:53.0, admin, 2021-04-01 10:29:53.0, School, 123456, null, null, null, null, null, null, null, null, null, John Doe, null, null, null, null, null, Mr.}'; nested exception is org
You can use specification api and SpecificationExecutor.
You have to Join Donation with MAO(MAO with Donor) then query for donations of a particular Donor.
I have some trouble with joining tables using Spring Boot JPA
I need to do this kind of joining:
**book2user — book to user
id INT NOT NULL AUTO_INCREMENT
time DATETIME NOT NULL
type_id INT NOT NULL
book_id INT NOT NULL
user_id INT NOT NULL**
Here are my Entity classes:
#Entity
#Table(name = "user")
public class User {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Integer id;
private String hash;
private Date reg_time;
private Integer balance = 0;
private String name;
// getters and setters
public class Book {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
#ManyToOne
#JoinColumn(name = "author_id", referencedColumnName = "id")
private Author author;
#ManyToOne
#JoinColumn(name = "genre_id", referencedColumnName = "id")
private Genre genre;
private String title;
private String slug;
private String description;
private String priceOld;
private String price;
private String image;
private boolean is_bestseller;
private Date pub_date;
// getters and setters
In order to do this kind of joining I should create another entity class ??
Something like this should work:
#Entity
#Table("book2user")
public class Book2User {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private LocalDateTime time;
private Integer typeId;
#OneToOne
private Book book;
#OneToOne
#JoinColumn(name = "user_id") //optional, if the name of the table and field matches.
private User user;
}
I have oneToOne RelationShip between Employee and student entity i want to fetch all field from Employee Entity and name and modelNumber From Laptop Entity
Employee Entity
public class Employee {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
#Column(name = "employee_name")
private String name;
#Column(name = "date_of_birth")
private String dob;
#Column(name = "gender")
private char gender;
#Column(name = "skills")
private String[] skills;
#OneToOne(fetch = FetchType.EAGER, cascade=CascadeType.ALL)
#JoinColumn(name = "laptop_id")
private Laptop laptop;
//getter setter
Laptop Entity
#Entity
public class Laptop {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String name;
private String ram;
private String modelNumber;
private String processor;
//getter Setter
select e.id, e.name, e.dob, e.gender, e.skills,
e.laptop.name, e.laptop.modelNumber
from Employee e
Please start by reading the docs: https://docs.jboss.org/hibernate/orm/5.4/userguide/html_single/Hibernate_User_Guide.html#hql
I'm trying to update my user entity and I have an error that comes to mind:
ERROR: A NULL value violates the NOT NULL constraint of the "id" column Detail: The failed row contains (null, 1, 1)
The problem surely stems from my relationship between user and profile which is n-n
public class Utilisateur implements Serializable {
private static final long serialVersionUID = 1L;
#Id
private Integer id;
private Integer fixe;
private Boolean deleted;
private Boolean actif;
private String email;
private Integer mobile;
private String motDePasse;
private String nom;
private String prenom;
#ManyToMany
private List<Profil> profils = new ArrayList<Profil>();
public Utilisateur() {
}
}
public class Profil implements Serializable {
private static final long serialVersionUID = 1L;
#Id
private Integer id;
private String codeProfil;
private String libelleProfil;
#JsonManagedReference
#ManyToMany
private List<MenuAction> menuActions = new ArrayList<MenuAction>();
public Profil() {
}
}
How you generate value for your id?
Seems you need some way to generate value for you ID.
For example, use #GeneratedValue, like:
#GeneratedValue(strategy = IDENTITY)